Issue 10, 2019

Functionalisable acyclic cucurbiturils

Abstract

Synthetic strategies are described to prepare acyclic cucurbituril derivatives with two different types of appended functional groups, one that mediates water solubility and another one that allows further functionalisation. The syntheses started with the coupling of a 1,4-disubstituted naphthalene derivative containing one 2-chloroethoxy and one 3-sulfonatopropoxy group to a suitable tetrameric glycoluril-derived precursor. This reaction afforded two regioisomers, differing in the relative orientation of the peripheral substituents, which could be separated in a straightforward fashion and structurally characterised. Both isomers were then converted into the corresponding diazides and diamines that served to append further residues by, respectively, copper(I)-catalysed azide–alkyne cycloaddition or amide formation. Binding studies showed that the functionalised dianionic acyclic cucurbiturils thus obtained possess a notable cation affinity in water, albeit a lower one than an analogue with four peripheral negatively charged substituents. This work constitutes the basis for the development of water-soluble acyclic cucurbiturils whose applications could potentially go beyond the use as receptors.

Graphical abstract: Functionalisable acyclic cucurbiturils

Associated articles

Supplementary files

Article information

Article type
Research Article
Submitted
29 Jän 2019
Accepted
21 Feb 2019
First published
22 Feb 2019

Org. Chem. Front., 2019,6, 1555-1560

Functionalisable acyclic cucurbiturils

D. Bauer, B. Andrae, P. Gaß, D. Trenz, S. Becker and S. Kubik, Org. Chem. Front., 2019, 6, 1555 DOI: 10.1039/C9QO00156E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements